Loco motive-brake



(No ModeL) G. S. STRONG.

' LOGOMOTIVE BRAKE. No. 315,973. Patented Apr. 14, 1885.

AQQW

Nv Firms. Pmo-mm n m. Wzisbhgton. 0,0.

* UNITED STATES PATENT OrrIcE.

GEORGE S. STRONG, OF PHILADELPHIA, PENNSYLVANIA.

LOCOMOTlVE-BRAKE.

SPECIFICATION forming part of Letters Patent No. 315,973, dated April 14:, 1885.

(No model.)

To all when I2, it may concern.-

Be itknown that I. GEORGE S. STRONG, a citizen of the United States, residing in Philadelphia, Pennsylvania, have invented a certain Improved Braking Mechanism for the Driving-Vheels of Locomotives, of which the following is a specification.

My invention consists of certain braking mechanism. fully described and claimed hereinafter, for the driving-wheels of a locomotive.

In the accompanying drawings, Figure 1 is a side vi w, partly in section, of my improved braking mechanism; Fig. 2, a vertical section on the line I 2, Fig. 1; and Fig. 3, a sectional plan on the line 3 4, Fig. l.

A and A represent parts of the two driv ing-wheels ofa locomotive, and B and B two bars of the frame-work of the engine.

D is a substantial casting, the construction of which will depend upon the character of the frame-work, the casting being in the present instance made for attachment to the two bars B B.

G G are the two shoes, each provided with a steel sole-plate, a. The shoe G is suspended by a link, H, to the casting D, and the other shoe, G, by a similar link, H, to the same casting. On one of the shoes (the shoe G in the present instance) is cast a short cylinder, I, into the piston J of which the rounded end of a rod, K, extends a short distance, this rod being connected to a rod, K, which is pinned to the shoe G.

The connection of one rod with the other is made by an ordinary rightand left screwcoupling, by which the distance apart of the shoes, when released, is determined; and in order that each shoe when released may be at a given distance from the wheel to which it appertains, I use stops, which in the present instance consist of set-screws passing through projections d on the links.

When the shoe G is released, it will fall away from the wheel A until its cylinder strikes the set-screw b of the link H, the shoe G at the same time falling away from the wheel A until it strikes the set-screw (shown by dotted lines) of the link H. In other words, while the distance apart of the shoes, when released, is determined by the couplingrods, the stops prevent one shoe from moving farther away from one wheel than the other shoe does from the other wheel.

A steanrpipe, M, forms a communication between the steam-space of the boiler and the cylinder I of the shoe G, the pipe being furnished with an ordinary three-way cock under the control of the engineer, who is thus enabled to direct steam to the cylinder in applying the brake-shoes to the wheels, or to exhaust steam from the cylinder when the shoes have to be released. This pipe may be arranged in difierent ways, but a portion of it must be vertical, or nearly so, and must be long and elastic enough to yield to the limited movement of the shoe.

I am aware that brake-shoes have been so combined with cylinders and pistons that they could be applied by steam or hydraulic press ure. This, therefore, I do not claim; but

I do claim as my invention- 1. The suspended shoe G, having a cylinder, I, cast in one therewith, in combination with the shoe G and piston J acting thereon, substantially as described.

2. The combination of the suspended shoe G and cylinder I carried thereby, with a piston in said cylinder, a shoe, G, carrying an adjustable rod, K K, acting on said piston, substantially as set forth.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

GEORGE S. STRONG.

Witnesses:

HARRY SMITH, HENRY Howson, Jr. 

